There are other options hun, I know its rough. I'm a freshman at Texas Tech University. I'm going to throw out some thoughts that came up, I know loans are not exciting but they would enable you to move out of your parents house and into a dorm on campus and take classes full-time. High school was tough for me since I moved right before the whole damn thing started...like you said it was hard to penetrate into the cliques. I did some school stuff that got me involved, swim team and photographer for the newspaper. Doing things involved with the school helped me integrate myself and I eventually became well-known by my junior year.
Oh another thought, since you're already a junior you wouldn't be paying off that many loans since you're almost done with your bachelors. I'm sorry its been so rough on you.
Fortunately for me I've loved college since my parents kissed me goodbye after moving me into my dorm. I met really nice people, made friends from my major, love the rec center, and have met a really great guy JStrider who introduced me to the TFP.
If I were you, I would consider taking out some loans to pay for school full-time, no shame in that. I would quit my job, after a 2-week notice of course. Request a dormroom or see if there are any available. Usually there are the second semester. Once loans were secure I would have mom and dad move me into the dorm and start off with a clean slate. Start eating in the dining halls, go to the rec on a regular basis where you're bound to meet new and interesting people. Visit clubs that you're interested in. Consider trying to hang out with people from classes you might enjoy. Just overall be more open to the experience. I hung out with my roommate alot and through that I met several groups of friends and James. Pretty happy now. The people in my major are all pretty cool, I think I get a little extra slack though for being a woman in Architecture as only 15% of the incoming freshman for it are. So needless to say a girl making friends is not too hard in a male dominated major.
Just be open, try intra-murals if your school has them. Avoid a frat as they don't seem your brand, good job for that opinion btw.
Can't think of anything else other than the pool if your school has one. Pools help relieve stress and help clear your head. Exercise overall does.
Hope this helps.
If you need to chat just IM me : ghoastgirl1
I'd be happy to talk to you and help ease your mood.
Good luck

The sun will shine again sir, you just need to wait till the clouds go away!
I know I've hit several depression points since going away to school, we all do.
No worries.